It all started when Danny Welbeck was brought down by Martin Skrtel when through on goal, although Howard Webb decided to only award a yellow - a fair decision given the distance to goal and the proximity of other defenders. From the free-kick, Robin van Persie stepped up to curl the ball in, and Evra met it with a fine header past Pepe Reina to give United some breathing space.
It could go down as Nemanja Vidic's goal, however, as the ball brushed off him on it's way into the net. One for the dubious goals committee to decide, but for now, United are in the driving seat at Old Trafford and things are looking grim for Liverpool. They need something different here, and quickly.